Q&A community for developers.

Community platform for software developers to write and learn

Largest online art community with millions of original works

Photo sharing and photography community for enthusiasts

Book reviews, reading lists and community recommendations

GPS fitness tracking for runners, cyclists and athletes

Online front-end code editor, showcase and community

Startup data, funding rounds, investors and company profiles

Online courses and degrees from top universities and companies

Q&A platform where experts and enthusiasts share knowledge

Free online courses from MIT, Harvard and 160+ institutions

Social film diary, movie lists and reviews community

Free MIT course materials published openly on the web

Network of communities for every topic and interest

High-speed train through the Channel Tunnel linking UK and Europe

Official site of the United Nations — peace and world affairs

World's largest board game database and enthusiast community